circuit breaker

Abstract

The application relates to a circuit breaker, which comprises a shell, a static contact and a control mechanism, further comprises a push rod movably installed in the shell, a moving contact arranged in the inside of the push rod, a reset elastic member arranged on the periphery of the push rod, a buckle mechanism and an automatic tripping mechanism installed on one side of the push rod, the head of the moving contact protrudes from the push rod, the push rod can drive the moving contact to contact the static contact and make the reset elastic member deform, the push rod is provided with a protruding matching part on the side towards the buckle mechanism, the buckle mechanism is used for clamping the matching part to limit the push rod when closing, the control mechanism is electrically connected with the automatic tripping mechanism and triggers the automatic tripping mechanism to drive the buckle mechanism to move away from the matching part, and the reset spring drives the push rod to reset immediately. The circuit breaker can ensure that the moving contact and the static contact can keep stable contact and the reliability of the breaking capacity.

Description

Technical Field

[0001] This invention relates to the field of circuit breakers, and more particularly to a circuit breaker. Background Technology

[0002] A circuit breaker is a switching device that can conduct, carry, and interrupt current under normal circuit conditions and can conduct, carry, and interrupt current under abnormal circuit conditions within a specified time. It can distribute electrical energy and protect power lines and motors. When they experience serious overload, short circuit, or undervoltage faults, it can automatically disconnect the circuit. Therefore, it is widely used in power electronic systems.

[0003] In related technologies, circuit breakers include thermal-magnetic circuit breakers, air circuit breakers, etc. However, the mechanism of traditional thermal-magnetic circuit breakers is relatively complex, involving many parts, with high requirements for the size and process of parts, and requiring a large internal space. They are also prone to failure and have low reliability. Traditional air circuit breakers generate a large arc when breaking under large short-circuit current conditions, which makes the moving and stationary contacts easy to be damaged, resulting in a short service life and limited application scenarios. Summary of the Invention

[0004] The technical problem to be solved by the present invention is at least one of the problems mentioned in the background art, and to provide a circuit breaker.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: A circuit breaker is constructed, comprising a housing, a stationary contact fixedly installed in the housing, and a control mechanism. The circuit breaker further includes a push rod movably installed in the housing, a moving contact disposed inside the push rod, a reset elastic element disposed on the outer periphery of the push rod, and a latching mechanism and an automatic tripping mechanism installed on one side of the push rod.

[0006] The housing has an insertion side, and the moving contact and the latching mechanism are located between the insertion side and the stationary contact.

[0007] The head of the moving contact protrudes beyond the push rod, which passes through the insertion side. The push rod can drive the moving contact to move closer to the stationary contact, thereby bringing the moving contact into contact with the stationary contact and deforming the reset elastic element.

[0008] The push rod has an outwardly protruding mating part on the side facing the latching mechanism. The latching mechanism is used to engage the mating part to limit the push rod when the circuit is closed.

[0009] The control mechanism is electrically connected to the automatic release mechanism and triggers the automatic release mechanism to move the latching mechanism away from the mating part. The reset elastic element is used to drive the push rod to reset.

[0010] In some embodiments, the circuit breaker further includes a manual tripping mechanism.

[0011] The manual release mechanism includes a rotating component rotatably mounted in the housing, a second elastic component disposed around the rotating component, and a release button passing through the insertion side.

[0012] The rotating member is provided with a pressing part extending toward the latching mechanism, and a pulling part cooperating with the second elastic member.

[0013] When subjected to external force, the release button can be displaced in the direction of the rotating member, causing the pressing part and the pulling part to rotate, thereby moving the latching mechanism away from the mating part and causing the second elastic member to deform.

[0014] When the second elastic element returns to its original shape, it causes the release button and the rotating element to reset.

[0015] In some embodiments, the latching mechanism includes a longitudinally elongated push rod and a first elastic member disposed at the end of the push rod away from the mating portion.

[0016] The push rod is used to abut against the mating part when the circuit is closed, and the push rod can be displaced away from the mating part by force and compress the first elastic element. The first elastic element is used to drive the push rod to reset.

[0017] In some embodiments, the mating part has an inclined wall on the side facing the stationary contact, and the push rod passes over the top rod by means of the inclined wall during its displacement toward the stationary contact. The mating part has a baffle wall on the side away from the stationary contact, and the top rod limits the push rod by abutting against the baffle wall after the push rod passes over the top rod.

[0018] In some embodiments, the automatic release mechanism includes a bracket, a fixed iron core located within the bracket, and a moving iron core, wherein the fixed iron core is closer to the mating portion than the moving iron core.

[0019] The push rod is inserted into the bracket, and one end of the push rod near the mating part protrudes out of the bracket.

[0020] The fixed iron core is fixed on the top rod, and the control mechanism is electrically connected to the fixed iron core. By energizing the fixed iron core, the moving iron core and the top rod are moved toward the fixed iron core.

[0021] In some embodiments, the displacement of the push rod during the closing process is greater than the opening distance between the moving contact and the stationary contact.

[0022] In some embodiments, the circuit breaker further includes a contact elastic element for providing contact pressure, the contact elastic element being mounted inside the push rod and located on the side of the moving contact away from the stationary contact.

[0023] In some embodiments, the push rod has a receiving cavity for accommodating the moving contact and the elastic element for the contact.

[0024] The moving contact is movably mounted in the receiving cavity, and the moving contact includes a moving contact body located in the receiving cavity.

[0025] In the open state, there is a first distance between the head side of the moving contact body and the inner wall of the receiving cavity adjacent to the stationary contact.

[0026] When the circuit is closed, the first distance becomes the minimum, or the head side of the moving contact body is attached to the inner wall of the receiving cavity adjacent to the stationary contact.

[0027] In some embodiments, the insertion side is provided with a second socket for inserting a power supply cable.

[0028] The circuit breaker also includes a conductive component, one side of which is located around the second socket, and the other side of which is mechanically and electrically connected to the moving contact.

[0029] In some embodiments, the circuit breaker further includes a load contact disposed in the housing and electrically connected to the stationary contact, wherein the load contact and the moving contact are respectively located on both sides of the stationary contact along the length of the circuit breaker.

[0030] The implementation of this invention has the following beneficial effects: When the circuit breaker of this invention is to be closed, the moving contact can be brought into contact with the stationary contact by manually pushing the push rod, and the position of the push rod is locked by the latching mechanism, thereby completing the closing. After closing, the moving and stationary contacts can maintain a stable contact because the latching mechanism locks the position of the push rod. When the circuit breaker is to be opened, the automatic tripping mechanism drives the latching mechanism to trip, and the push rod is quickly reset under the action of the reset elastic element, ensuring the reliability of the breaking capacity. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0032] Figure 1 This is a schematic diagram of the internal structure of a circuit breaker in the open state after omitting part of the outer casing in some embodiments of the present invention;

[0033] Figure 2 This is a schematic diagram of the circuit breaker in some embodiments of the present invention with most of the structure omitted along the insertion side direction;

[0034] Figure 3 This is an exploded view of the closing mechanism in some embodiments of the circuit breaker of the present invention;

[0035] Figure 4 This is a schematic diagram of the internal structure of the circuit breaker in some embodiments of the present invention at the moment when the mating part just contacts the top rod;

[0036] Figure 5 This is a longitudinal structural cross-sectional view of the latching mechanism and the automatic release structure in some embodiments of the present invention;

[0037] Figure 6 This is a schematic diagram of the structure between the rotating member, the second elastic member, and part of the outer shell in some embodiments of the present invention;

[0038] Figure 7 This is a schematic diagram of the internal structure of the circuit breaker in some embodiments of the present invention at the moment when the moving and stationary contacts just make contact;

[0039] Figure 8 This is a schematic diagram of the internal structure of a circuit breaker in the closed state in some embodiments of the present invention;

[0040] Figure 9 This is a schematic diagram of the internal structure of the circuit breaker in some embodiments of the present invention, showing how it completes the tripping process with the help of a manual tripping mechanism.

[0041] Figure 10 This is a longitudinal cross-sectional view of the automatic release structure and the buckling mechanism in some embodiments of the present invention to complete the release.

[0042] Figure label:

[0043] Circuit breaker 100; housing 1; first housing part 11; limiting mounting groove 111; limiting protrusion 112; insertion side 12; first socket 121; second socket 122; third socket 123; closing mechanism 2; push rod 21; rod body 211; first chamber 2111; second chamber 2112; guide rail groove 2113; extension part 212; mating part 213; inclined wall 2131; baffle 2132; hand grip 214; compression spring part 215; contact elastic element 22; reset elastic element 23; moving contact 24; moving contact body 241; moving contact 2 42; Sleeve post 243; First distance 25; Stationary contact 3; Stationary contact body 31; Stationary contact point 32; Load contact 4; Snap-on mechanism 5; Top rod 51; First elastic element 52; Ring-shaped part 53; Manual tripping mechanism 6; Rotating part 61; Rotating body 611; Pressing part 612; Force-receiving part 613; Pulling part 614; Tripping button 62; Second elastic element 63; Automatic tripping mechanism 7; Bracket 71; Fixed iron core 72; Moving iron core 73; Feedback module 81; Trigger switch 811; Conductive component 9; Height direction H, Length direction L; Width direction W. Detailed Implementation

[0044] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0045] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0046] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0047] The present invention constructs a circuit breaker 100, which can ensure the reliability of contact between moving and stationary contacts, and under the premise of reliable contact, effectively avoids the energy generated during connection and disconnection between moving and stationary contacts, thereby extending service life.

[0048] In some embodiments, the circuit breaker 100 may be a relatively flat, elongated square structure. Of course, the shape of the circuit breaker 100 may also be other shapes, which are not specifically limited here.

[0049] For ease of explanation of this plan, please refer to... Figure 1 , Figure 2 The arrows shown indicate the height direction H, length direction L, and width direction W of the circuit breaker 100. Hereinafter, the height direction H of the circuit breaker 100 is taken as the longitudinal reference direction, and the length direction L of the circuit breaker 100 is taken as the transverse reference direction.

[0050] Please see Figure 1 In some embodiments, the circuit breaker 100 may include a housing 1, a closing mechanism 2, a stationary contact 3, a load contact 4, a latching mechanism 5, a manual tripping mechanism 6, an automatic tripping mechanism 7, and a control mechanism.

[0051] The housing 1 provides a mounting base and protection for the internal structure. The closing mechanism 2, stationary contact 3, and load contact 4 are sequentially and laterally mounted within the housing 1. The closing mechanism 2 and stationary contact 3 can be at the same height. The latching mechanism 5, manual tripping mechanism 6, and automatic tripping mechanism 7 are also mounted within the housing 1, all located below the closing mechanism 2. The stationary contact 3 and load contact 4 are fixed within the housing 1 and are electrically connected. At least a portion of the closing mechanism 2 can be laterally moved back and forth within the housing 1, contacting and separating from the stationary contact 3 according to the direction of displacement. The closing mechanism 2 can return to the open position without external force or restriction. The latching mechanism 5 can lock the closing mechanism 2 when it is fully in contact with the stationary contact 3, restricting its movement and ensuring reliable continuous contact between the closing mechanism 2 and the stationary contact 3. Both the manual tripping mechanism 6 and the automatic tripping mechanism 7 are used to release the restriction effect of the latching mechanism 5 on the closing mechanism 2. The difference is that the manual tripping mechanism 6 relies on manual operation, while the automatic tripping mechanism 7 can be triggered automatically or manually. The control mechanism can be installed in the housing 1, located between the stationary contact 3 and the load contact 4. The control mechanism provides the basis for starting the automatic tripping mechanism 7.

[0052] It should be noted that, in order to facilitate the demonstration of the internal structure of circuit breaker 100, Figure 1 At least some structures of the outer casing 1 have been omitted. Furthermore, either the manual tripping mechanism 6 or the automatic tripping mechanism 7 can be used depending on actual needs; it is not necessary to have both. The manual tripping mechanism 6 uses a mechanical linkage method, which offers higher reliability, while the automatic tripping mechanism 7 uses a circuit control method, an automated design, and can trip immediately when circuit problems occur.

[0053] When the circuit breaker 100 is put into use, one end of the power supply wire can be inserted into the housing 1 and electrically connected to the closing mechanism 2. The load can be mechanically and electrically connected to the load contact 4. The closing mechanism 2 can be manually pushed into the housing 1 to make contact with the stationary contact 3 to complete the closing action, thus connecting the load and the power supply. Alternatively, under the action of the manual tripping mechanism 6 or the automatic tripping mechanism 7, the latching mechanism 5 can be released, and the closing mechanism 2 can be separated from the stationary contact 3, thereby disconnecting the load and the power supply. The following describes in detail the structure of multiple components such as the housing 1, closing mechanism 2, stationary contact 3, load contact 4, latching mechanism 5, manual tripping mechanism 6, automatic tripping mechanism 7, and control mechanism in some embodiments of the present invention.

[0054] See Figure 1In some embodiments, the outer casing 1 is a rectangular box structure, which may include a detachable and combinable first casing 11 and a second casing (not shown). The inner side of the first casing 11 may be provided with multiple mounting slots, defining multiple mounting spaces for the installation of structures such as the closing mechanism 2, stationary contact 3, load contact 4, snap-fit ​​mechanism 5, manual tripping mechanism 6, and automatic tripping mechanism 7. The second casing may cover the inner side of the first casing 11, forming a relatively closed structure. Alternatively, the inner sides of the first casing 11 and the second casing may be provided with mirror-symmetrical mounting slots to define the mounting spaces.

[0055] The first housing 11 is provided with a limiting mounting groove 111 located around the closing mechanism 2 for cooperating with the closing mechanism 2, and a limiting protrusion 112 located around the latching mechanism 5 for cooperating with the latching mechanism 5.

[0056] It is worth noting that, please refer to [link / reference needed]. Figure 2 The outer casing 1 has an insertion side 12, which can be one side of the first casing 11 in the lateral direction. The wall surface of the insertion side 12 is provided with a first insertion hole 121 and a second insertion hole 122. The first insertion hole 121 is used to allow part of the closing structure to protrude outside the outer casing 1, so as to provide a basis for manually operating the closing structure. The second insertion hole 122 is used for inserting the power supply line.

[0057] Please read back Figure 1 The control mechanism may include a control circuit module (not shown) and a feedback module 81, which are located between the stationary contact 3 and the load contact 4. The feedback module 81 may be located around the stationary contact 3 and has a trigger switch 811 for cooperating with the closing mechanism 2. It should be noted that the control circuit module can control the automatic tripping mechanism 7 to operate under preset conditions, and the feedback module 81 can send a closing signal or a tripping signal to the control circuit module during closing or opening. Preset conditions may include triggering the tripping switch, preset time, circuit fault, etc. The working principles and specific structures of these two mechanisms, as well as how the control circuit module controls the automatic tripping mechanism 7, can be found in existing technology and will not be elaborated here.

[0058] Continue reading Figure 1 In some embodiments, the closing mechanism 2 may include a push rod 21, a moving contact 24, a contact elastic element 22, and a reset elastic element 23.

[0059] like Figure 1As shown, the push rod 21 can be longitudinally elongated and is installed below the limiting mounting groove 111. The length direction of the push rod 21 is parallel to the lateral direction, allowing it to move laterally back and forth within the housing 1. The push rod 21 provides a mounting and moving base for the moving contact 24 and also helps to deform the contact elastic element 22 and the reset elastic element 23. The moving contact 24 is embedded inside the push rod 21 and can move with the push rod 21, thereby contacting and separating from the stationary contact 3. The contact elastic element 22 is also embedded in the push rod 21, located on the side of the moving contact 24 away from the stationary contact 3. During the process from the initial contact of the moving contact 24 to the completion of closing, it deforms under the action of the push rod 21 and the moving contact 24, thereby providing contact pressure for the moving contact 24 to press tightly against the stationary contact 3. The reset elastic element 23 is disposed in the limit mounting groove 111, located above the push rod 21. When the moving contact 24 moves toward the stationary contact 3, the reset elastic element 23 can be deformed by force to provide the push rod 21 and the moving contact 24 to return to the open position when the circuit is opened. The open position can be understood as the position of the components in the open state.

[0060] Understandably, the contact elastic element 22 is not a necessary component for the closing mechanism 2 to achieve opening and closing. As a preferred solution, the contact elastic element 22 can also provide contact pressure for the moving contact 24 to press tightly against the stationary contact 3 after closing, ensuring reliable contact between the moving contact 24 and the stationary contact 3. Moreover, it provides appropriate buffering force when the moving contact 24 just contacts the stationary contact 3, which can prevent the moving contact 24 from hitting the stationary contact 3 too hard and effectively reduce the wear between the moving contact 24 and the stationary contact 3.

[0061] Furthermore, the displacement of the push rod 21 during closing is greater than the opening distance between the moving contact 24 and the stationary contact 3, causing the moving contact 24 to overtravel, thus avoiding poor contact due to wear of either the moving contact 24 or the stationary contact 3. Please refer to [link / reference]. Figure 2 The circuit breaker 100 may also include a conductive component 9 fixed in the housing 1. One side of the conductive component 9 may be located around the second socket 122 for electrical connection with the wire when the wire is inserted into the second socket 122. The other side may be located around the moving contact 24 of the closing mechanism 2 and is mechanically and electrically connected to the moving contact 24.

[0062] Please see Figure 3 In some embodiments, the push rod 21 may include a rod body 211, an extension 212 disposed above the head of the rod body 211, a mating part 213 disposed below the head of the rod body 211, a handhold part 214 disposed at the tail of the rod body 211, and a compression spring part 215 disposed above the rod body 211.

[0063] In this regard, please combine Figure 1 and Figure 3Referring to the reference, the rod 211 can be a longitudinally elongated square structure, with at least most of its structure located inside the outer casing 1, and defining a receiving cavity within itself. This cavity includes a first chamber 2111 for accommodating the moving contact 24 and a second chamber 2112 for accommodating the contact elastic element 22. The second chamber 2112 is located on the lateral side of the first chamber 2111 away from the stationary contact 3. The first chamber 2111 and the second chamber 2112 have no cavity wall on one side in the width direction W. This can be understood as the rod 211 having an opening on the side in the width direction W where the first chamber 2111 and the second chamber 2112 are located, to facilitate the insertion of the moving contact 24 and the contact elastic element 22. The rod 211 has a guide groove 2113 on the inner side of the other side in the width direction W where the first chamber 2111 is located, to limit the movement trajectory of the moving contact 24 and prevent deviation. Optionally, one end of the guide groove 2113 is located opposite the head of the rod 211 and can be flush laterally with the inner wall of the first chamber 2111 adjacent to the stationary contact 3. The other end extends to the second chamber 2112, so that part of the structure of the moving contact 24 can be located in the second chamber 2112. Furthermore, the wall surface of the head of the rod 211 facing the stationary contact 3 has a through hole communicating with the first chamber 2111, for allowing part of the structure of the moving contact 24 to extend out.

[0064] The extension 212 may be longitudinally elongated and include two ends. One end is fixed to the head of the rod 211, for example, on the top surface of the head, and the other end extends toward the feedback module 81 and is at the same height as the feedback module 81. By moving with the rod 211, the extension 212 can contact or separate from the trigger switch 811 of the feedback module 81, triggering the feedback module 81 to send a closing signal or a opening signal.

[0065] Please see Figure 4 The mating part 213 can be provided on the bottom surface of the head of the rod 211. It has an inclined wall 2131 on the side facing the stationary contact 3, and the inclined wall 2131 can be inclined from bottom to top towards the stationary contact 3. The mating part 213 also has a vertical baffle 2132 on the side away from the stationary contact 3. Optionally, the mating part 213 can be a block structure with a right-angled trapezoidal cross-section. The rod 211 can easily pass over the latching mechanism 5 with the help of the inclined wall 2131, and after passing over the latching mechanism 5, the position of the rod 211 is locked by the baffle 2132.

[0066] Please read back Figure 1 and Figure 3 The handle 214 can be located at the tail of the rod 211, for example, connected to the end face of the tail of the rod 211, located outside the outer casing 1, for the user to grip and push the rod 21. Preferably, the longitudinal cross-sectional area of ​​the handle 214 can be larger than the longitudinal cross-sectional area of ​​the rod 211.

[0067] The compression spring 215 can be provided on the top surface of the rod 211 and located in the limiting mounting groove 111. It can move with the rod 211 and cooperate with the groove wall of the limiting mounting groove 111.

[0068] Please continue to combine Figure 1 and Figure 3 Referring to the above, in some embodiments, the moving contact 24 may be a plate-like structure installed in the first chamber 2111. It includes a moving contact body 241, a contact portion located on the side of the moving contact body 241 facing the stationary contact 3, and a sleeve portion 243 located on the side of the moving contact body 241 facing away from the stationary contact 3. At least a portion of the contact portion passes through a through hole communicating with the first chamber 2111 and protrudes from the rod body 211. The top of the contact portion is provided with a moving contact point 242 for contacting the stationary contact 3. The sleeve portion 243 is used for the contact elastic element 22 to be sleeved thereon, and the sleeve portion 243 can be fixed to the side of the tail of the moving contact body 241. It should be noted that the length of the moving contact body 241 is less than the length of the guide groove 2113; its specific function can be found in the working process analysis below.

[0069] The contact elastic element 22 can be installed in the second chamber 2112 and sleeved on the sleeve portion 243 of the moving contact 24. It can deform under the cooperation of the cavity wall of the second chamber 2112 and the moving contact body 241. Optionally, the contact elastic element 22 can be a cylindrical helical spring.

[0070] The reset elastic element 23 can be installed in the limiting mounting groove 111, between the compression spring portion 215 and the groove wall of the limiting mounting groove 111, and can deform under the cooperation of the compression spring portion 215 and the groove wall of the limiting mounting groove 111. Optionally, the reset elastic element 23 can be a cylindrical helical spring.

[0071] Please see Figure 1 In some embodiments, the stationary contact 3 may include a plate-shaped stationary contact body 31 and a stationary contact point 32 fixed on the side of the stationary contact body 31 facing the closing mechanism 2. Optionally, the stationary contact body 31 may be vertically fixed in the housing 1, with its plane parallel to the longitudinal direction.

[0072] like Figure 1 As shown, in some embodiments, the load contact 4 can be a U-shaped structure with its opening facing the outside of the housing 1. A conductive element that can be electrically connected to the load can be inserted into the opening of the load contact 4. The conductive element can be a copper busbar connecting piece. Optionally, as shown... Figure 1 As shown, when the two ends of the load contact 4 extend to the same side, they can first come together and then separate, reducing the opening size of the load contact 4 and facilitating the fixing of the conductive parts.

[0073] The load contact 4 may include two, which may be arranged longitudinally at intervals. One of them is used for connection between positive terminals. This load contact 4 is electrically connected to the stationary contact 3 through a conductive element such as a wire. The other load contact 4 is used for connection between negative terminals. Correspondingly, the insertion side 12 is also provided with a third socket 123. This other load contact 4 can be electrically connected to a wire inserted into the third socket 123 through a conductive element such as a wire. The wire inserted into the third socket 123 is used to connect to the negative terminal of the power supply.

[0074] Please combine Figure 4 and Figure 5 Referring to the reference, in some embodiments, the latching mechanism 5 may include a longitudinally elongated push rod 51 and a first elastic element 52 connected below the push rod 51. In the open state, the top of the push rod 51 is longitudinally higher than the bottom of the mating portion 213 of the push rod 21. A ring-shaped portion 53 for cooperating with the manual release mechanism 6 is also sleeved around the circumference of the push rod 51. When subjected to downward pressure, the push rod 51 can sink downwards via the first elastic element 52, thus reducing the height of the push rod 51. The top of the push rod 51 has a slope, the direction of which can be adapted to the inclined wall 2131, facilitating the mating portion 213 to pass over the push rod 51. Optionally, the longitudinal section of the top of the push rod 51 is preferably frustum-shaped. The first elastic element 52 is compressed when the push rod 51 sinks, and can drive the push rod 51 to reset when no external force is applied. Resetting can be understood as returning to the open position. Optionally, the first elastic element 52 may be a cylindrical helical spring.

[0075] Please combine Figure 4 and Figure 6 Referring to the above, in some embodiments, the manual release mechanism 6 may include a release button 62, a rotating member 61, and a second elastic member 63. The release button 62, the rotating member 61, and the second elastic member 63 are approximately at the same height. The rotating member 61 is rotatably mounted in the housing 1. By pushing the release button 62 toward the rotating member 61, the rotating member 61 can be rotated, thereby pressing down the push rod 51. The second elastic member 63 accumulates elastic potential energy during the rotation of the rotating member 61 and releases this energy when no external force is applied, causing the rotating member 61 to rotate in the opposite direction to reset. Simultaneously, the rotation of the rotating member 61 in the opposite direction also pushes the release button 62 back to its original position.

[0076] In some embodiments, such as Figure 4 As shown, the release button 62 is movably inserted through the wall of the insertion side 12. The tail of the release button 62 protrudes from the wall of the insertion side 12. By pressing the release button 62, it is moved laterally into the outer casing 1. The head of the release button 62 can abut against the rotating member 61 and push the rotating member 61 to rotate.

[0077] Combination Figure 4 and Figure 6As shown, the rotating component 61 may include a rotating body 611, a pressing part 612, a force-receiving part 613, and a pulling part 614. The rotating body 611 is rotatably mounted on the first housing 11, for example, by fitting the rotating body 611 onto a rotating shaft fixed in the first housing 11. The rotating body 611 can rotate around this shaft. Understandably, the axis of the rotating body 611 is located below the release button 62. The pressing part 612 is connected to the side of the rotating body 611 facing the latching mechanism 5, and is used to drive the push rod 51 downwards. The pressing part 612 may be a U-shaped structure, overlapping the annular portion 53 of the push rod 51. The force-receiving part 613 is connected to the side of the rotating body 611 facing the release button 62, and is used to contact the release button 62. The tension part 614 is connected to the side of the force-receiving part 613 that is close to the second elastic member 63. It is located between the force-receiving part 613 and the first housing in the width direction W. It is used to act on the second elastic member 63 to deform it when the rotating body 611 rotates. Since the limiting protrusion 112 is located on the side of the tension part 614 that is away from the rotating body 611, it can constrain the rotation angle of the entire rotating member 61 and avoid excessive rotation.

[0078] like Figure 6 As shown, the second elastic element 63 can be installed between the rotating body 611 and the first housing. The second elastic element 63 can be a torsion spring, one end of which can be fixedly connected to the tension part 614 of the rotating body 611, or it can be set on the displacement path of the tension part 614. The other end can be located below the tension part 614 and fixed to the outer shell 1.

[0079] Please read back Figure 5 In some embodiments, the automatic release mechanism 7 may include a bracket 71, a fixed iron core 72 and a moving iron core 73 located in the bracket 71. The fixed iron core 72 and the moving iron core 73 are arranged longitudinally at intervals, with the moving iron core 73 located above the fixed iron core 72. The fixed iron core 72 is electrically connected to the control circuit module of the control mechanism. The control circuit module can energize the fixed iron core 72 under preset operating conditions, causing the fixed iron core 72 to generate magnetism. During assembly, the push rod 51 can be vertically installed in the bracket 71, the moving iron core 73 is fixed on the push rod 51, and the first elastic member 52 is installed between the moving iron core 73 and the fixed iron core 72. When the fixed iron core 72 is magnetized, it can drive the moving iron core 73 and the push rod 51 to move longitudinally downward. It can be seen that the latching mechanism 5 and the automatic release mechanism 7 of the present invention can be combined into one, simplifying the structure and saving key components.

[0080] The following combination Figure 1 , Figure 4 , Figures 7 to 10 The following describes the specific working process of the circuit breaker 100 of the present invention in some embodiments:

[0081] See Figure 1The figure shows the position, state, and connection relationship of the internal structure of the circuit breaker 100 in the open state. It can be seen that when the circuit is open, the push rod 21 and the moving contact 24 are biased towards the insertion side 12 and have a large distance from the stationary contact 3. The extension 212 of the push rod 21 also has a distance from the trigger switch 811 of the feedback module 81. It is particularly noteworthy that there is a first distance 25 between the head side of the moving contact body 241 and the inner wall of the first chamber 2111 adjacent to the stationary contact 3. The contact elastic element 22 and the reset elastic element 23 are in the minimum deformation state (this minimum deformation state can be understood as the state with the smallest deformation during the opening and closing process, and the deformation can be zero).

[0082] Combination Figure 4 When the circuit is open and the tripped state is observed, the highest point of the push rod 51 is higher than the lowest point of the mating part 213 in the longitudinal direction, and the first elastic element 52 is in a state of minimum deformation; the trip button 62 is also biased towards the insertion side 12, and there is a distance between it and the force-bearing part 613 of the rotating part 61. Of course, the trip button 62 can also abut against the force-bearing part 613 of the rotating part 61, as long as no force is applied to the force-bearing part 613; Figure 6 As shown, the tension part 614 of the rotating member 61 abuts against the limiting protrusion 112, the second elastic member 63 is in the minimum deformation state, and the pressing part 612 of the rotating member 61 is located above the annular part 53 of the push rod 51, but no force is applied to the annular part 53.

[0083] See Figure 4 This figure illustrates the position, state, and connection relationship of the internal structure of the circuit breaker 100 at the moment when the push rod 21 just touches the top rod 51 during the closing process. It can be seen that to close the circuit, the push rod 21 can be pushed into the housing 1, causing it to move linearly towards the stationary contact 3. During the closing process, the distance between the spring portion 215 of the push rod 21 and the corresponding groove wall of the limiting mounting groove 111 gradually decreases, the reset elastic element 23 gradually compresses, and since the top of the top rod 51 is higher than the bottom surface of the mating portion 213 in the longitudinal direction, the push rod 21 will touch the top rod 51 during the closing process.

[0084] See Figure 7This figure illustrates the position, state, and connection relationship of the internal structure of the circuit breaker 100 when the push rod 21 presses down on the top rod 51 during the closing process. It can be seen that when the push rod 21 touches the top rod 51 and continues to move linearly towards the stationary contact 3, the inclined wall 2131 of the mating part 213 of the push rod 21 acts on the top of the top rod 51, pressing the top rod 51 downwards, allowing the push rod 21 to pass over the top rod 51. It should be noted that while the mating part 213 is still applying downward pressure to the top rod 51, the moving contact 242 of the moving contact 24 can contact the stationary contact 32 of the stationary contact 3. It should be noted that the closing process is not yet complete at this time; this contact can be understood as the moving contact 242 and the surface of the stationary contact 32 being in contact, but the moving contact 24 has not yet received a reaction force from the stationary contact 32.

[0085] See Figure 8 The figure shows the position, state, and connection relationship of the internal structure of the circuit breaker 100 in the closed state. It can be seen that after the moving contact 242 contacts the stationary contact 32, the push rod 21 needs to continue to move linearly towards the stationary contact 3 until the mating part 213 completely passes the push rod 51 to complete the closing. During this process, the contact elastic element 22 begins to be compressed, providing a thrust that moves the moving contact 24 to the right in the figure. That is, the moving contact 24 provides contact pressure. Simultaneously, because the length of the moving contact body 241 is less than the guide rail groove 2113 (see reference...), Figure 3 As the length of the contact changes, the relative position of the moving contact 24 and the push rod 21 changes. Under the push of the contact elastic element 22, the moving contact body 241 moves to the right relative to the push rod 21 in the figure, the first distance 25 becomes smaller, and the moving contact 24 can press tightly against the stationary contact 3, thus improving the reliability of the contact.

[0086] After the mating part 213 completely passes over the push rod 51, the push rod 51, since it is not subjected to downward pressure, rests on the first elastic element 52 (see reference). Figure 10 Under the action of the mechanism, the push rod 51 returns to its original height. The push rod 51, which returns to its original height, abuts against the baffle 2132 of the mating part 213, locking the push rod 21 and keeping it in its current position. This ensures the reliability of the contact between the moving contact 24 and the stationary contact 3. At the same time, the extension 212 of the push rod 21 abuts against and triggers the trigger switch 811. The feedback module 81 sends a closing signal to the control circuit module, thus completing the closing. After closing, the contact elastic element 22 and the reset elastic element 23 are in the maximum deformation state. At this time, the deformation reaches its maximum. The first distance 25 reaches its minimum and can become zero. That is, the head side of the moving contact body 241 is attached to the inner wall of the first chamber 2111 adjacent to the stationary contact 3.

[0087] See Figure 9This figure illustrates the position, state, and connection relationship of the internal structure of the circuit breaker 100 when switching back to the open state using the manual trip mechanism 6. It can be seen that when switching back to the open state is required, the trip button 62 can be pushed into the housing 1, causing the push rod 21 to move linearly towards the rotating member 61. Subsequently, the trip button 62 will abut against the force-bearing part 613 of the rotating member 61, causing the entire rotating member 61 to rotate clockwise (understandably, this rotation direction is only for the embodiment shown in Figures; the specific rotation direction can be determined according to actual needs). The pressing part 612 abuts against the annular part 53 of the push rod 51, pressing the entire push rod 51 down. Simultaneously, referring to... Figure 6 The tension portion 614 of the rotating member 61 also acts on the second elastic member 63, causing the second elastic member 63 to deform. As the push rod 51 moves down, the push rod 21 returns to the open position under the action of the reset elastic member 23, and the moving contact 24 also returns to the open position under the action of the contact elastic member 22. The first distance 25 returns to its original size, thus completing the tripping and opening action. When the extension portion 212 of the push rod 21 leaves the trigger switch 811 of the feedback module 81, it can also trigger the feedback module 81 to send an opening signal to the control circuit module.

[0088] Subsequently, when the trip button 62 is released, the rotating part 61 rotates in the opposite direction, i.e., counterclockwise, under the action of the second elastic element 63, until it returns to its original position. During this process, the rotating part 61 will push the trip button 62 outward, and the trip button will also return to its original position. Moreover, the push rod 51 will also rise under the action of the first elastic element 52, returning to the open position.

[0089] See Figure 10 The figure illustrates the position, state, and connection relationship of the latching mechanism 5 and the automatic tripping mechanism 7 when switching back to the open state using the automatic tripping mechanism 7. It can be seen that the control circuit module can energize the stationary core 72 when opening is required, causing the stationary core 72 to become magnetic. The moving core 73 is attracted to the stationary core 72, driving the push rod 51 to move longitudinally downwards. The push rod 21 is then pushed against the reset elastic element 23 (see reference). Figure 9 Under the action of ), it returns to the open position, thus completing the tripping and opening actions.

[0090] Subsequently, the control circuit module disconnects the power supply to the stationary iron core 72, causing the stationary iron core 72 to lose its magnetism. The moving iron core 73 and the push rod 51 will also rise under the action of the first elastic element 52, returning to the open position.

[0091] In summary, the circuit breaker 100 of the present invention can bear the energy generated by connection and disconnection through solid-state switch structures such as push rod 21, manual tripping mechanism 6 or automatic tripping mechanism 7 and latching mechanism 5, without the need for moving and stationary contacts to bear the energy generated by connection and disconnection, thereby ensuring reliable contact and disconnection between moving and stationary contacts and effectively avoiding wear between them.

[0092] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A circuit breaker, comprising a housing (1), a stationary contact (3) fixedly mounted in the housing (1), and a control mechanism, characterized in that, The circuit breaker also includes a push rod (21) movably mounted in the housing (1), a moving contact (24) disposed inside the push rod (21), a reset elastic element (23) disposed on the outer periphery of the push rod (21), and a latching mechanism (5) and an automatic tripping mechanism (7) mounted on one side of the push rod (21). The housing (1) has an insertion side (12), and the moving contact (24) and the latching mechanism (5) are located between the insertion side (12) and the stationary contact (3). The head of the moving contact (24) protrudes beyond the push rod (21), which passes through the insertion side (12). The push rod (21) can drive the moving contact (24) to move closer to the stationary contact (3) so as to bring the moving contact (24) into contact with the stationary contact (3) and to deform the reset elastic member (23). The push rod (21) has an outwardly protruding mating part (213) on the side facing the latching mechanism (5). The latching mechanism (5) is used to engage the mating part (213) to limit the push rod (21) when the circuit is closed. The control mechanism is electrically connected to the automatic release mechanism (7) and triggers the automatic release mechanism (7) to drive the latching mechanism (5) away from the mating part (213), and the reset elastic element (23) then drives the push rod (21) to reset.

2. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes a manual tripping mechanism (6). The manual release mechanism (6) includes a rotating component (61) rotatably mounted in the housing (1), a second elastic component (63) disposed around the rotating component (61), and a release button (62) passing through the insertion side (12). The rotating member (61) is provided with a pressing part (612) extending toward the latching mechanism (5) and a pulling part (614) cooperating with the second elastic member (63). When the release button (62) is subjected to external force, it can be displaced in the direction of the rotating member (61), driving the pressing part (612) and the pulling part (614) to rotate, thereby causing the latching mechanism (5) to move away from the mating part (213), and causing the second elastic member (63) to deform. The second elastic element (63) is used to drive the release button (62) and the rotating element (61) to reset.

3. The circuit breaker according to claim 1, characterized in that, The latching mechanism (5) includes a longitudinally elongated push rod (51) and a first elastic element (52) located at the end of the push rod (51) away from the mating part (213). The push rod (51) is used to abut against the mating part (213) when the circuit is closed, and the push rod (51) can be displaced away from the mating part (213) under force and compress the first elastic member (52). The first elastic member (52) is used to drive the push rod (51) to reset.

4. The circuit breaker according to claim 3, characterized in that, The mating part (213) has an inclined wall (2131) on the side facing the stationary contact (3). The push rod (21) passes over the top rod (51) by means of the inclined wall (2131) during its displacement towards the stationary contact (3). The mating part (213) has a baffle (2132) on the side away from the stationary contact (3). After the push rod (21) passes over the top rod (51), the top rod (51) abuts against the baffle (2132) to limit the push rod (21).

5. The circuit breaker according to claim 3, characterized in that, The automatic release mechanism (7) includes a bracket (71), a fixed iron core (72) and a moving iron core (73) located in the bracket (71), wherein the fixed iron core (72) is closer to the mating part (213) than the moving iron core (73). The push rod (51) is inserted into the bracket (71), and one end of the push rod (51) near the mating part (213) protrudes out of the bracket (71). The fixed iron core (72) is fixed on the top rod (51). The control mechanism is electrically connected to the fixed iron core (72) and drives the moving iron core (73) and the top rod (51) to move towards the fixed iron core (72) by energizing the fixed iron core (72).

6. The circuit breaker according to claim 1, characterized in that, The displacement of the push rod (21) during the closing process is greater than the opening distance between the moving contact (24) and the stationary contact (3).

7. The circuit breaker according to claim 6, characterized in that, The circuit breaker also includes a contact elastic element (22) for providing contact pressure, the contact elastic element (22) being installed inside the push rod (21) and located on the side of the moving contact (24) away from the stationary contact (3).

8. The circuit breaker according to claim 7, characterized in that, The push rod (21) is provided with a receiving cavity for accommodating the moving contact (24) and the contact elastic element (22). The moving contact (24) is movably mounted in the receiving cavity, and the moving contact (24) includes a moving contact body (241) located in the receiving cavity. In the open state, there is a first distance (25) between the head side of the moving contact body (241) and the inner wall of the receiving cavity adjacent to the stationary contact (3). When the circuit is closed, the first distance (25) becomes the minimum, or the head side of the moving contact body (241) is attached to the inner wall of the receiving cavity adjacent to the stationary contact (3).

9. The circuit breaker according to claim 1, characterized in that, The insertion side (12) is provided with a second socket (122) for inserting a power supply line. The circuit breaker also includes a conductive component (9), one side of which is located around the second socket (122), and the other side of which is mechanically and electrically connected to the moving contact (24).

10. The circuit breaker according to claim 1, characterized in that, The circuit breaker also includes a load contact (4) disposed in the housing (1) and electrically connected to the stationary contact (3). The load contact (4) and the moving contact (24) are respectively located on both sides of the stationary contact (3) along the length of the circuit breaker.

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